Electric locomotive



Sept. 1, 1925. I 1,551,835

. E. C. MORGAN ELECTRIC LOCOMOTIVE Filed Jan. 26, 1921 2 $hee'cs$hcet 15 'Zgvwewfoz Sept. 1, i925 1 835 E. c. MORGAN ELECTRIC LOCOIIOTIVE'Filed Jan. 26, 1921 I 2 shun-sheet, 2

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UNITED STATES PATENT OFFICE.

EDMUND C. IIIORGAN, OF NEW YORK, N. "L; OLIVE MIORGAN ADIMINISTRATBIX OFSAID EDMUND C. MORGAN, DECEASED.

ELECTRIC LOCOIVIO TIVE.

Application filed January To all whom it may concern.

Be it known that I, EDMUND C. NtonoAN, a citizen of the United States,residing at New York city, in the county of New York and State ofNmvYork, have invented a new and useful Electric Locomotive, of whichthe following is a specification.

My invention relates to improvements in electric locomotives in which anarmature of an electric motor employed to propel the locomotive ismounted to encircle an axle of a pair of driving wheels to revolve inunison therewith and resiliently connected thereto to drive the same orbe driven thereby. The objects of the improvement are to increase theefficiency of such locomotives throughout a wide range of speeds; toreduce the unsprunq' weight to a low percentage of the total weight; toprovide high insulating resistance between the motor, or motors if morethan one is employed, and the other parts of the mechanism; to economizespace and to increase the durability by lessening shocks. Other objectswill appear in the description.

I attain these objects by the mechanism illustrated in the accompanyingdrawings, in which Figure 1 is a side elevation of the locomotive truck,partly in section, and Figure 2 an end elevation partly in section. The

three sections shown in Fig. 1, are taken on Fig. 2, as follows: Thepart between the center of the axle9 and the longitudinal center of thelocomotive; the part between the longitudinal center of the locomotiveand the axle 10 and the part to the right of the axle 10 respectively at1, 1; 1 1 and 1 1 Fig. 2, looking in the direction indicated by thearrows. The two sections shown in Fig. 2, are taken as follows: The partto the right of the lateral center and the part to the left of thelateral center respectively at 2, 2 and 2 2*, Fig. 1, looking in thedirection inclicated by the arrows. Figure 3 is an enlarged sectionalend view of a portion of the armature sleeve and the spiderFigs. 1 and2, showing my preferred form of connection and insulation between them.Fig. 1 is a sectional view of Fig. 3 taken on line 4, 4t, looking in thedirection indicated by the arrows. Fig. 5 is a sectional view on areduced scale taken on line 5, 5, Fig. 3, looking in the directionindicated by the arrows showing construction of the parts shown in as,1921. Serial No. 440,184.

Figs. 3 and 4 for the full length of the armature sleeve and spider.

Similar reference signs refer to similar parts throughout the severalviews.

Locomotives embodying my invention may be constructed having one or morepairs of driving wheels. As herein shown the locomotive is provided withtwo pairs of driving wheels. 7

Referring to Figs. 1 and 2, the main frame 6 is provided with journalboxes 7 and leafsprings 8, of usual construction. Carried in the journalboxes are the axles 9 and 10 having driving wheels 11. Mounted on theaxles 9 and 10 are the motors 12. As these motors with their mountingsin the main frame 6 and their connections to the axles 9 and 10 are thesame, I have placed the same reference signs on the same parts of each.I will describe one which will answer for both.

The main frame of the motor is composed of two box-like frames 13 and11-, preferably made of aluminum or some metal that will radiate heatrapidly, this being assisted by ribs such as 15. The lower frame 13 isbolted to the upper frame 14 along a hori zontal plane containing thelongitudinal axis of the axle by means of the long bolts 16, two at eachside of the motor frame on opposite sides of an axle, and by short bolts16 at each end. The motor frame 12 has at each side provision forreceiving the bearings for the armature 18.

The motor is of the eight pole type, having four pole pieces 19, two ofwhich are detachably secured to the lower part 13 and two detachablysecured to the upper part lt of the field frame 12, and so spaced as toform eight pole faces about equidistant apart around an armature.

The pole pieces 19 are of novel construction and are provided withexciting coils of novel form. The form of the polepieces permits of anarmature being used that in diameter is nearly equal to the height ofthe motor frame and the form of the exciting coils permits of a shortmotor frame and also provides a large radiating surface for the coils.The pole pieces are built up of thin soft plates 20 and thick metal endplates 21, Fig.2 held together by heavy bolts 22 and bolt 23 Fig. 1. Theend plates 21 have lugs 24 and25 by which they are. se

ing bushings 17which constitute the bearcured to the frames 13 and 1% bymeans of cap screws shown in Fig. 2. The exciting coils 26 each form atriangle in outside outline or section in side view as in Fig. 1.

The armature 18 of the motor in the form of a ring is composed of theusual well known discs, end plates for the discs, comn'iutator,windings, etc. mounted on a metal ring 27 to each end of which aresecured end plates 28 each having a projection 29 the outside of whichforms a bearing in the bushings 17.

On the axle over which the motor is mounted is a spider 30 secured tothe axle by means of keys, said spider having an outside diameter morethan one-third the outside diameter of the armature. The periphery ofthis spider faces the inside surface of the ring 27 of the armature.Secured to the periphery of the spider is a ring of insulation 31, andsecured to the inside surface of the armature ring is a ring ofinsulation 32. Between the two insulation sur faces are placed coilsprings formed in rows legthwise of the spider and around the same so asto approximately fill the space between the periphery of the spider andthe inside of the ring 27. The ends of the springs are emoedded in theinsulation.

The motor frame 12 is spring supported on the main frame 6 so that allof the weight of the motor or any portion desired may be carried by themain frame. In case itwas practically all carried by the main fran'iethe main oflice of the springs 33 would be to transmit the motion of thearmature to the axle and form a guide for the motor. I will now describethis suspension for the motor on the main frame.

At the four upper cornersof the motor frame 12 are secured the brackets34 by means of bolts. Heavy insulation is interposed in the f'asteningsto electrically insulate the brackets from the motor. Pivotallyconnected to the brackets 34; are the links 35 extending upwardly andpivotally connected to the ends of the arms 36 which are mounted on andsecured rigidly to the shafts 37 which are rotatably mounted in the longframes 38 extending across the locomotive and secured to the sides ofthe main frame (3 by bolts. Pivotally connected to the ends of the arms36, on the same center that the upper ends of the links are pivoted, arethe eye bolts 89, the outer ends of which are slidingly mounted in theblocks 40 that are pivotally mounted in the long frames 38. he eye bolts39 are threaded for nuts 41, and thick washers 12 are provided. Betweenthe washers 42 and the blocks 40 are mounted around the eye bolts 39 thehelical compression springs 4:3. It will be seen by the peculiararrangen'ient of the arms 86, the links and the spring actuated eyebolts39, that practically a constant upwardly pulling force will be appliedto the motor frame through a considerable range of vertical movement ofthe main frame of the locomotive by reason of the variation inleverages. It will also be seen that by adjusting the springs at oneside of the motor to apply a different tension from the tension of thesprings at the other side of the motor, the difference in weight of thetwo sides of the motor can be con'ipensated for so as to maintain itparallel with the axle.

In order to permit the motor to have vertical movement with respect tothe main frame of the locomotive and at the same time prevent it fromrevolving around the axle, I have provided guiding means consisting offlanged brackets 41-4, two at each side of the motor located near thetop and two at each side of the motor located near the bottom. cecuredto the main fran'ic (5 and electrically insulated therefrom are thebrackets 4-5, the end of one of each extending to the flanged face ofone of the lower bracke s ir l. Secured to the ends of arms 1:6, whichextend from the long frames and electrically insulated therefrom, arethe flat metal bars 16, the end of one of each ex tending to the flangedface of one of the upper brackets ll. Enough clearance is left betweenthe ends of the brackets l6, and the flanged faces of the brackets 44 toobtain a sliding fit.

Considerable clearance is left at all points between the motor and theother parts of the locomotive so that with the insulation described themotor is completely insulated electrically. This particularly desirablewhere a high tension initial current such as 3000 volts, for instance,is supplied to the locomotive and then divided between several motors byconnecting say four of them to operate pern'ianently in series so thatthe tension of any one is only 750 volts. Vith my invention the motorwindings need only be insulated for the lower pressure while anadditional insulation is provided for the higher pressure across theline.

Referring to Figs. 3, l and 5 which illustrate my preferred form ofconnection between the arma'ture sleeve and the spider, 17 is thearmature sleeve and 48 the spider, corresponding respectively to thearmature sleeve 27 and the spider 30 shown in Figs. 1 and 2. Theinsulating medium consists of a cylindrical shaped piece 1-9 of uniformthickness throughout, made of n'iica or othe high electrical and h atresisting qualities and compression strength. Long strips 50, of metalor fiber are provided which are straight on their outer surfaceslengtlnvise but curved laterally to correspond to the curvature of theinside surface of the insulation i?) and tapered from each end on theinside flat surface so as to be thicker at the center, and of the properwidth and in sufficient number to cover the entire inner surface of theinsulation l9 except for the small spaces between them when pressed outtightly against the insulation. These strips 50 arecurved laterally on tieir tapered faces to fit the curved tapered faces of the twocylindrical metal rings 51, which are provided with a number of holesrunning lengthwise through them and spaced evenly around theircircumference. These holes receive the bolts 52, which serve to pull thetwo rings 51 together and wedge the parts 47, 49, 5O tightly together.

The rings 51 are provided with ribs 53 extending around their insidesurfaces and between the ribs and outside of the two outer ribs springs54: are secured to the rings 51, extending in rows circumferentially andlongitudinally, corresponding to the arrangement of the springs 33 Figs.1 and 2. The spider 48 is provided with longitudinal slots to receivethe lugs 55, one of which is secured to the free end of each of thesprings 54. Rings 56 are bolted to each end of the spider 48 to hold thelugs 55 in place. This serves through the springs 54 to hold thearmature in place laterallywith respect to the spider except for acushioned movement permitted by the give of the springs.

By means of my invention I provide large spaces for theconnectionsbetween the armatures and the axles, and for those spaces Ihave provided insulating medium and resilient driving means of suchstrength as to have a large factor of safety for transmitting themotionof powerful armatures to the axles, and to secure the greatdurability so necessary for such apparatus.

Having described my invention, I claim:

1. In an electric locomotive, an axle, driv- I ing wheels mounted on theaxle, a main frame yieldingly mounted on the axle for vertical movementwith respect thereto, an electric motor adapted to be mounted with 1tsrevolving drivlng part encircling the axle, means carried by the mainframe havmg compensating means connected to the motor to support it onsaid mam frame so as to maintain the said revolving driving part inapproximately fixed relation to the axle throughout the verticalmovement of the main frame on the axle, and resilient drivingconnections between the revolving driving part of the motor and theaxle.

2. In an electric locomotive, a main frame yieldingly supported on anaxle of a pair of driving wheels to have vertical movement with respectthereto, an electric motor adapted to be carried by the main frame andto drive the axle through resilient driving connections, and twoindependently acting yielding supporting means of different supportingstrength mounted on the main frame and connected to the motor to supportthe motor in an approximately fixed relation to the axle irrespective ofthe vertical movement of the main frame.

3. In an electric locomotive, a main frame yieldingly supported forvertical movement on an axle havin a pair of driving wheels, anelectric; :otor for driving the axle, resilient drivin means connectingthe motor and axle, and means for supporting the motor on the main frameto permit vertical movement between them while maintaining the motor inan approximately fixed relation to the axle; said means consisting of aplurality of devices, each device including an arm pivoted in the mainframe with its free end extending upwardly at an angle, a bar havingpivotal connection with the free end of the arm and extending downwardlyto pivotal connection at its lower end with the electric motor, a rodpivoted at one end to the free end of the arm and extending in ahorizontal position in a direction away from the pivot of the arm in themain frame, a sliding support for the free end of the rod pivoted in themain frame, a collar on the rod adjustable along the rod by means of athread and nut on the rod, and a compression spring on the rod betweenthe collar and the pivoted support.

4:. In an electric locomotive, a main frame yieldingly supported forvertical movement on an axle having a pair of driving wheels, anelectric motor for driving the axle, resilient driving means connectingthe motor and axle, and means for supportin the motor on the main frameto permit vertical movement between them while maintaining the motor inan approximately fixed relation to the axle; said means comprising twosupplemental frames, spaced apart, mounted on the main frame andextending over the motor, two horizontal shafts mounted on thesupplemental frames one at each side of the motor and parallel to thelength of the motor, each shaft having connected to it one at each end,mechanism consisting of an arm mounted on the shaft with its free endextending upwardly. at an angle, a bar having a pivotal connection withthe free end of the arm and extending downwardly to a pivotal connectionon a bracket secured to the motor, a rod pivoted at one end to the freeend :of the arm and extending in ahorizontal position in a directionaway from the horizontal shaft, a sliding support for the free end ofthe rod pivoted in the supplemental frame, a collar on the rodadjustable along the rod by means of a thread and nut on the rod, and acompression spring on the rod between the collar and the pivotalsupport.

5. In an electric locomotive, a main frame yielding-1y supported forvertical movement on an axle of a pair of driving wheels, a motorconsisting of a frame and a revolving driving part for driving the axlemounted with the revolving driving part encircling the axle, resilientconnecting means between the revolving driving part of the motor and theaxle, supporting means for the motor on the main frame adapted to permitvertical movement of the main frame with respect to the motor, andvertical sliding guiding means between the main frame and the frame ofthe motor to prevent the frame of the motor from revolving whilepermitting the vertical movement of the main frame.

6. In an electric locomotive, an axle, driving wheels for the axle, aspider having a rim mounted on and secured to the axle, an electricmotor for driving the axle having an armature mounted on a sleevearranged to encircle the spider, and helical springs for transmittingthe motion of the armature sleeve to the spider mounted between theinside surface of the sleeve and the face of the spider, each with oneof its ends connected to the sleeve and its other end connected to thespider.

7. In an electric locomotive, an axle, driving wheels for the axle, aspider having a rim mounted on the axle and secured thereto to drive it,an electric motor for driving the axle havin an armature mounted on asleeve arranged to encircle the spider, insulation around the innersurface of the sleeve, rings inclosed within the circle of insulationand provided with wedging devices to lock the rings, insulation andarmature sleeve together, and springs for transmitting the motion of thearmature with the said locked together parts to the spider and axlemounted between the inner surface of the rings and the face of the rimof the spider, each with one of its ends secured to the inner surface ofthe rings and its other end secured to the rim of the spider.

8. In an electric locomotive, an axle, a spider carried by said axle,and an armature mounted to encircle said spider and carried byresilientmeans on the periphery of said spider, said resilient meansalso serving to transmit the motion of the armature to the spider.

9. In an electric locomotive, an axle, driving wheels on said axle, aspider carried by said axle for carrying and transmitting the motion ofan armatiilre, resilient driving means between said armature and saidspider, said spider having an outside diameter of more than one third ofthe outside diameter of said armature.

10. In an electric locomotive, an axle, a spider carried by said axle,an armature including a sleeve of approximately the same length as thespider mounted to encircle the spider, spaced therefrom, and a resilientmedium for transmitting the motion of the armature to the spideroccupying approximately all the space between the periphery of thespider and the inside surface of the sleeve.

11. In an electric locomotive, a main frame, two driving wheels spacedapart having bearings in said frame, a barrel like member extendingapproximately through the space between the said driving wheels andrigidly secured thereto, an armature for imparting motion to said drivinwheels mounted to encircle said barrel like member, and a resilientmedium occupying approximately the entire peripheral face of said barrellike member to support said armature and transmit the motion of saidarmature to said driving wheels.

12. In an electric locomotive, a driving axle, an armature mounted toencircle said axle and including a sleeve, end plates secured to saidsleeve for closing the ends thereof and resilient means forming the solemeans for transmitting the motion of the armature to the axle saidresilient means being enclosed between said end plates.

13. In an electric locomotive, a driving axle, an armature including asleeve mount-- ed to encircle the axle, and a resilient electricalinsulating medium extending circumferentially around the inner face ofsaid sleeve and inclosed between the ends thereof, the said electricalinsulating medium forming the sole means of transmitting the motion ofthe arniature to the axle.

1%. In an electric locomotive, a driving axle, an armature including asleeve mounted to encircle the axle, and a series of helical springshaving endwise bearing on the inner surface of the sleeve and spacedlengthwise and circun'iferentially of the inner surface of the sleeve toform a motion transmitting means between the armature and the axle.

15. In an electric locomotive, a driving axle, an armature including asleeve mounted to encircle the axle, and a series of radially extendingsprings having longitudinally spaced bearings on the inner surface ofthe sleeve extending approximately the length of the sleeve and spacedcircumferentially to form a motion transmitting means between thearmature and the axle.

16. In an electric locomotive, a main frame, a driving axle havingbearings in said main frame, an armature mounted to encircle said axle,resilient means contained between the ends of said armature and havingconnection to said armature and said axle to form motion transl'nittingmeans between said armature and said axle, and a field frame for saidarmature having bearings to guide it in fixed relation to said armature.

17. In an electric locomotive, a main frame, a driving axle havingbearings in said main frame, an armature mounted to encircle said axle,resilient means contained between the ends of said armature and havingconnection to said armature and said axle to form motion transmittingmeans between the armature and driving axle, a field frame for saidarmature having bearings to guide it in fixed relation to said armature,and yielding suspension means between said main frame and said fieldframe,

18. In an electric locomotive, the combination with an axle, of drivingwheels thereon, a main frame yieldingly mounted on said axle forvertical movement rela tively thereto, an electric motor comprising arotating part encircling the axle, means yieldingly connected betweenthe main frame and said electric motor for compensating for variation ofweight of end portions thereof to maintain the same parallel to theaxle, and resilient driving connections between the revolving parts ofthe motor and the axle.

19. In an electric locomotive, the combination with an axle, of tractionwheels thereon, a drum on said axle, an electric motor concentric withsaid axle and encircling the same, and a multiplicity of resilientdriving connections distributively connected between the cylindricalsurface of said drum and said electric motor.

20. In an electric locomotive, the combination with a driving axle, ofan electric motor armature mounted to encircle said axle and comprisinga cylindrical sleeve, a spider drum on said axle and within said sleevebut spaced therefrom, and a multi plicity of springs connected betweensaid drum and said sleeve by being distributed over the surface of saiddrum.

21. In an electric locomotive, the combination with a driving axle, ofan electric motor armature comprising a cylindrical sleeve mounted toencircle said axle, and a multiplicity of radial springs connectedbetween said axle and said sleeve by being distributed over the innercylindrical surface of said sleeve to form a resilient powertransmitting means between said armature and said axle.

22, In an electric locomotive, the combination with an axle, of wheelsthereon, a main frame resiliently mounted on said axle, an electricmotor having a frame pivotally connected to said frame, a drum on saidaxle, a cylindrical sleeve connected to the armature of the motor andmounted concentrically with said axle but spaced from said drum, amultiplicity of springs distributively connected between said drum andsaid sleeve, and yielding means co-acting with the pivotal connectionsbetween said motor and main frame for maintaining the motor parallel tosaid axle.

In an electric locomotive, an axle, two axle boxes one mounted at eachend of said axle, a frame rigidly connected to the axle boxes to movetherewith, driving wheels mounted on said axle between said axle boxes,and an electric motor mounted around said axle between said drivingwheels having its revolving driving part secured to said axle and itsstationary part secured to said frame.

24;. In an electric locomotive, an axle, two axle boxes one mounted ateach end of said axle, a frame rigidly connected to the axle boxes tomove therewith, driving wheels mounted. on said axle between said axleboxes, and an electricmotor mounted around said axle between saiddriving wheels having its revolving driving part secured to said axleand its stationary part secured to said frame, the means for securingsaid stationary part to said frame being adjustable to vary the distancebetween the stationary part and the frame.

EDMUND o. MORGAN.

